'Do well' is not enough detail for us to help you.
What conditions do you need your sheep to do well in?
Especially the climate, the topography (upland sheep won't appreciate spongy turf and lowland sheep don't climb as well and their hooves grow more slowly.)
What sort of management program do you have in mind?
girl power ... turns out to be about a hundred watts. But they seriously don't like being connected to the grid. Tiny ad:
permaculture and gardener gifts (stocking stuffers?)